Calcium-Carboxyl Intrabridging during Interfacial Polymerization: A Novel Strategy to Improve Antifouling Performance of Thin Film Composite Membranes
Calcium-Carboxyl Intrabridging during Interfacial Polymerization: A Novel Strategy to Improve Antifouling Performance of Thin Film Composite Membranes
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界面聚合过程中的钙-羧基内桥联：提高薄膜复合膜防污性能的新策略
DOI：
10.1021/acs.est.8b05690
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发表时间：
2019-04-16
影响因子：
11.4
通讯作者：
Tang, Chuyang Y.
中科院分区：
文献类型：
--
作者：
Hao, Xiujuan;Gao, Shanshan;Tang, Chuyang Y.
本研究报告了一种新的内桥策略，以提高薄膜复合（TFC）膜的抗静电性能。我们表明，在界面聚合反应过程中加入钙导致形成稳定的钙2 +-羧基复合物内的聚酰胺排斥层。这种内桥的羧基基团的Ca 2+有效地螯合它们，降低其在水溶液中的结合二价金属离子和形成犯规金属膜间桥的可用性。膜污染和清洗实验证实了Ca 2+改性膜的通量稳定性和污染可逆性的改善。这些膜的极大增强的渗透性能，连同它们更好的表面亲水性和更大的水渗透性，使得内桥接方法在克服经典的渗透性-选择性-渗透性权衡方面非常有吸引力。我们的研究结果为合成高性能TFC膜开辟了新的方向。
This study reports a novel intrabridging strategy to improve the antifouling performance of a thin-film composite (TFC) membrane. We demonstrate that the addition of Ca2+ during the interfacial polymerization reaction led to the formation of stable Ca2+-carboxyl complexes within the polyamide rejection layer. This intrabridging of carboxyl groups by Ca2+ effectively sequestrated them, reducing their availability for binding divalent metal ions in the aqueous solution and for forming foulant-metal-membrane interbridges. Membrane fouling and cleaning experiments confirmed improved flux stability and fouling reversibility for the Ca2+ modified membranes. The greatly enhanced antifouling performance of these membranes, together with their better surface hydrophilicity and greater water permeability, makes the intrabridging approach highly attractive in overcoming the classical permeability-selectivity-antifouling trade-off. Our findings pave a new direction for synthesizing high-performance TFC membranes.